Well on one hand that's something that even humans can't do that well, on the other there already are a load of reddit bots that search for relevant strings in

Well on one hand that's something that even humans can't do that well, on the other there already are a load of reddit bots that search for relevant strings in posted comments and reply when relevant. I suppose it would be a more advanced version of that, just interjecting when the probability that it knows what info follows is large enough, just replace the stream of new comments with a speech to text engine.